sons dataStory

Types of variables All data generated by measurement, surveys, research, etc. can be variables and also use the term feature in machine learning. An event contains multiple variable values and is called an instance . The following table contains three variables: name, age, gender, height, and three events: instances. A typical form of data, each variable consists of a column and an instance of a row, which is called a dataset. name age sex height A 10 male 153 B 15 female 161 C 21 male 181 In constructing a dataset, the number of questions equals the number of variables, and the number of respondents affects the number of observations. However, the number of respondents does not affect the number of variables. As shown in Table 1.1, all variables are separated by categorical variables and quantitative variables, and variables are separated by nominal, ordinal, discrete, and continuo...